It's nice when you don't have to take our word for it but evidence presents itself :) More and more study is being done on the effectiveness and use of Obeya. One of them is a study from Norway by A. Alassaar in 2017.
In the research different applications of Obeya have been tested and it is proven that Obeya "positively impacts the ability to understand and communicate information".
That's exactly the essential part of what we're trying to achieve in the Obeya, to share context visually so we can make better decisions more effectively. Good to know that teams that have started on this journey are not just enthusiastic because their Obeya looks really cool. It actually makes a difference.
Interested in the research? Read the original thesis: https://pdfs.semanticscholar.org/41d3/86dcb800b86f20e9dd2e69cad90bb9c38a27.pdf